Description 
 
HON 380 gas pressure regulator with HON 673/674 controller    9 
 
Control range W
dsu
  Design for lower response pressure 
5 to 60 mbar 
K4: Diaphragm measuring unit 
15 to 120 mbar 
K5: Diaphragm measuring unit 
40 to 300 mbar 
K6: Diaphragm measuring unit 
 
The technical specifications and the Maintenance section, as well as the spare 
parts lists and spare parts drawings in the appendix, describe all the gas pressure 
regulator versions and all the models corresponding to the standard for this de-
vice type. Special-purpose versions are identified with “SO” in the inspection cer-
tificate, which is included with the gas pressure regulator. 
However, other versions and models will be covered specifically as well when there 
are important differences that need to be pointed out.   
If you have trouble understanding the information in this documentation, contact 
the manufacturer without fail before starting any work on the device. 
 
 
2.3  Labels/Markings 
 
Illegible information on the device poses a risk of injury due to resulting erro-
neous operation, use, or installation. 
Labels, as well as inscriptions and stamping on the device, can eventually be-
come soiled or otherwise unrecognizable to such an extent that users will not be 
warned effectively of hazards and may be unable to follow required operating in-
structions. This will pose a risk of injury. 
  Make sure to always keep all relevant labels in good condition so that they will 
be easily legible. 
  Immediately replace damaged and missing labels. 
 
The labels and markings of the gas pressure regulator can be found here: 
Figure  No.  Description 
1  Regulator type plate 
2  Gas pressure regulator type plate 
3  Arrow indicating direction of flow on 
controller type plate 
4  Body nominal size 
5  Arrow indicating the direction of flow 
 
For the location of the nameplates, as well as a detailed list of the information on 
them and what it means, please refer to: 
Identifying the device (see page 10) 
 
Small labels must be used to color-code and explicitly name the gas pressure reg-
ulator’s connection lines (measuring lines and operating lines) based on what the 
lines are intended for and their minimum nominal size. 
 
 
Versions and designs 
in this user manual 
tor HON 380 labels 
and markings 
Nameplates 
lines